3500505725 has 24 divisors (see below), whose sum is σ = 4396403880. Its totient is φ = 2764523520.

The previous prime is 3500505703. The next prime is 3500505737. The reversal of 3500505725 is 5275050053.

It can be written as a sum of positive squares in 12 ways, for example, as 1203604249 + 2296901476 = 34693^2 + 47926^2 .

It is not a de Polignac number, because 3500505725 - 2²⁶ = 3433396861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3500505691 and 3500505700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2698277 + ... + 2699573.

It is an arithmetic number, because the mean of its divisors is an integer number (183183495).

Almost surely, 2^3500505725 is an apocalyptic number.

It is an amenable number.

3500505725 is a deficient number, since it is larger than the sum of its proper divisors (895898155).

3500505725 is a wasteful number, since it uses less digits than its factorization.

3500505725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609 (or 2604 counting only the distinct ones).

The product of its (nonzero) digits is 26250, while the sum is 32.

The square root of 3500505725 is about 59165.0718329658. The cubic root of 3500505725 is about 1518.3676099854.

Adding to 3500505725 its reverse (5275050053), we get a palindrome (8775555778).

The spelling of 3500505725 in words is "three billion, five hundred million, five hundred five thousand, seven hundred twenty-five".